Looks like some vehicles got out with bad fuel rails. The attached instructions show your dealer or you how to check your fuel rail. I looked at mine from the passenger side under the intake with a flashlight and good glasses. I did not need the video scope they talk about. The row of numbers you are looking for is the row closest to the firewall. Mine was 1b14111Y. Out of the range of bad numbers 1b14120Y-1b14215Y according to the letter attached.